1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "compat.h"
18 
19 #include <sys/uio.h>
20 
21 #include <stdint.h>
22 #include <stdlib.h>
23 #include <string.h>
24 
25 #include "log.h"
26 #include "utils.h"
27 #include "kamid.h"
28 
29 #include "table.h"
30 
31 int
32 table_open(struct kd_conf *conf, const char *name, const char *type,
33     const char *path)
34 {
35 	struct table *t;
36 	struct kd_tables_conf *entry;
37 	struct table_backend *backends[] = {
38 		&table_static,
39 		NULL,
40 	}, *b;
41 	size_t i;
42 
43 	for (i = 0; backends[i] != NULL; ++i) {
44 		b = backends[i];
45 		if (!strcmp(type, b->name))
46 			goto found;
47 	}
48 	log_warn("unknown table type %s", type);
49 	return -1;
50 
51 found:
52 	if (b->open == NULL) {
53 		log_warn("can't open table %s (type %s)",
54 		    name, b->name);
55 		return -1;
56 	}
57 
58 	t = xcalloc(1, sizeof(*t));
59 	strlcpy(t->t_name, name, sizeof(t->t_name));
60 	if (path != NULL)
61 		strlcpy(t->t_path, path, sizeof(t->t_path));
62 	t->t_backend = b;
63 
64 	if (t->t_backend->open(t) == -1)
65 		fatal("can't open table %s (type %s)",
66 		    name, path);
67 
68 	entry = xcalloc(1, sizeof(*entry));
69 	entry->table = t;
70 	STAILQ_INSERT_HEAD(&conf->table_head, entry, entry);
71 	return 0;
72 }
73 
74 int
75 table_add(struct table *t, const char *key, const char *val)
76 {
77 	if (t->t_backend->add == NULL) {
78 		log_warn("can't add to table %s (type %s)",
79 		    t->t_name, t->t_backend->name);
80 		return -1;
81 	}
82 
83 	return t->t_backend->add(t, key, val);
84 }
85 
86 int
87 table_lookup(struct table *t, const char *key, char **ret_val)
88 {
89 	if (t->t_backend->lookup == NULL) {
90 		log_warn("can't lookup table %s (type %s)",
91 		    t->t_name, t->t_backend->name);
92 		return -1;
93 	}
94 
95 	return t->t_backend->lookup(t, key, ret_val);
96 }
97 
98 void
99 table_close(struct table *t)
100 {
101 	if (t->t_backend->close != NULL)
102 		t->t_backend->close(t);
103 }